New CPT® codes for online digital E/M. 99421 Online digital evaluation and management service, for an established patient, for up to 7 days cumulative time during the 7 days; 5-10 minutes. 99422 11—20 minutes. 99423 21 or more minutes. These codes are for use when E/M services are performed, of a type that would be done face-to-face, through ....